<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <link rel="stylesheet" href="css121.css">
    </head>
    <body>
        <!-- 待办事项 -->
        <div class="nav">
            <input type="text">
            <button>新建任务</button>
        </div>
        <div class="container">
            <div class="todo">
                <h3>未完成</h3>
            <div class="row">
                <input type="checkbox">
                <span>吃饭</span>
                <button>删除</button>
            </div>
            </div>
                <div class="done">
                <h3>已完成</h3>
            </div>
        </div>
    </body>
    <script src="js121.js"></script>
</html>